LAWYER PROFILE

Iwona Terlecka

Europe 2026

Clifford Chance

Ranked in 1 practice area

Competition/Antitrust

Poland

20 years ranked

About

Provided by Clifford Chance

Practice Areas

Iwona Terlecka specialises in Polish and European law, with emphasis on the issues related to combating cartels, compliance programmes and dominant position. She has advised on the largest Polish cartel cases concerning a dominant position and also precedential procedural issues. She regularly represents clients in proceedings before civil court in actions for damages for infringements of competition law and protective consumer rights.

Iwona is an expert on merger control proceedings before the Polish Office of Competition and Consumer Protection and the European Commission.

Career

University of Silesia, Poland (Master of Law) 1993

College of Europe, Belgium, LLM (Master of European Law) 1994

Joined Clifford Chance 1995

Admitted as a legal adviser (radca prawny) in Poland 1999

Professional Memberships

Member of the Board of the Polish Competition Law Association; Member of the Warsaw Bar Association (OIRP)

Chambers Review

Provided by Chambers

Chambers European Guide

Competition/Antitrust - Poland

Band 1

Individual Editorial

Iwona Terlecka moves into the top tier of the rankings on the back of her broad competition law practice that covers both behavioural and merger control mandates. She has notable experience representing clients in investigations into alleged cartels and other unfair commercial practices, as well as acting on subsequent appeals and private enforcement actions.

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Strengths

Provided by Chambers

She is one of the most competent lawyers we work with.
Competition/AntitrustChambers European Guide
One of the most experienced competition lawyers in Poland, Iwona Terlecka is clear and coherent in strategic scenarios. She has deep knowledge and explains her view in a straightforward way. She listens carefully and is open for a dialogue.
Competition/AntitrustChambers European Guide
We appreciate her pro-business advice and pragmatic approach.
Competition/AntitrustChambers European Guide
Iwona Terlecka is the best-in-class competition lawyer with deep business knowledge.
Competition/AntitrustChambers European Guide
She is a top competition lawyer in Poland.
Competition/AntitrustChambers European Guide